1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package net
6
7import (
8	"runtime"
9	"syscall"
10	"time"
11)
12
13func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
14	// The kernel expects milliseconds so round to next highest
15	// millisecond.
16	d += (time.Millisecond - time.Nanosecond)
17	msecs := int(d / time.Millisecond)
18	if err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, msecs); err != nil {
19		return wrapSyscallError("setsockopt", err)
20	}
21	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, msecs)
22	runtime.KeepAlive(fd)
23	return wrapSyscallError("setsockopt", err)
24}
25